Excellent capacitive performance of a three-dimensional hierarchical porous graphene/carbon composite with a superhigh surface area

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dc.contributor.authorLi, X.
dc.contributor.authorXing, W.
dc.contributor.authorZhou, J.
dc.contributor.authorWang, G.
dc.contributor.authorZhuo, S.
dc.contributor.authorYan, Z.
dc.contributor.authorXue, Q.
dc.contributor.authorQiao, S.
dc.date.issued2014
dc.description.abstractThree-dimensional hierarchical porous graphene/ carbon composite was successfully synthesized from a solution of graphene oxide and a phenolic resin by using a facile and efficient method. The morphology, structure, and surface property of the composite were investigated intensively by a variety of means such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), N 2 adsorption, Raman spectroscopy, and Fourier transform infrared spectroscopy (FTIR). It is found that graphene serves as a scaffold to form a hierarchical pore texture in the composite, resulting in its superhigh surface area of 2034 m 2 g 1 , thin macropore wall, and high conductivity (152 Sm 1 ). As evidenced by electrochemical measurements in both EMImBF 4 ionic liquid and KOH electrolyte, the composite exhibits ideal capacitive behavior, high capacitance, and excellent rate performance due to its unique structure. In EMImBF 4 , the composite has a high energy density of up to 50.1 Wh kg 1 and also possesses quite stable cycling stability at 100 8C, suggesting its promising application in high-temperature supercapacitors. In KOH electrolyte, the specific capacitance of this composite can reach up to an unprecedented value of 186.5 Fg 1 , even at a very high current density of 50 A g 1 , suggesting its prosperous application in high-power applications.
dc.description.statementofresponsibilityXue Jin Li, Wei Xing, Jin Zhou, Gui Qiang Wang, Shu Ping Zhuo, Zi Feng Yan, Qing Zhong Xue, and Shi Zhang Qiao
dc.identifier.citationChemistry - A European Journal, 2014; 20(41):13314-13320
dc.identifier.doi10.1002/chem.201402897
dc.identifier.issn0947-6539
dc.identifier.issn1521-3765
dc.identifier.orcidQiao, S. [0000-0002-1220-1761] [0000-0002-4568-8422]
dc.identifier.urihttp://hdl.handle.net/2440/96330
dc.language.isoen
dc.publisherWiley
dc.rights© 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
dc.source.urihttps://doi.org/10.1002/chem.201402897
dc.subjectCarbon; conducting materials; graphene; supercapacitors; surface chemistry
dc.titleExcellent capacitive performance of a three-dimensional hierarchical porous graphene/carbon composite with a superhigh surface area
dc.typeJournal article
pubs.publication-statusPublished

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